Spray Foam Insulation in Panama City, FL

Spray foam insulation is a two-part liquid that reacts as it leaves the gun, expands, and sets into a solid layer stuck to the surface it hits. Unlike batts or loose fill, it closes the cracks and holes it covers, so it stops air from moving as well as slowing heat. In Panama City that matters because the load on a house is not only heat. Humid outdoor air leaking in carries moisture the air conditioner has to pull out, and that latent load is a big part of why AC systems here run so long. Sealing the leaks cuts both.

Open-cell foam

Open-cell foam is light and spongy, with cells that are not fully closed. HomeGuide rates it at R-3.5 to R-3.7 per inch and prices it at $1.50 to $3.50 per square foot installed. It expands a lot, so it fills rafter bays and wall cavities fully, around wires and odd framing. It lets some water vapor through, which can be useful because it lets a roof deck dry inward if it ever gets a little wet. It also deadens sound, which owners of rentals and condos near the beach tend to like. Its main use around Panama City is under the roof deck in a sealed attic and inside walls.

Closed-cell foam

Closed-cell foam is denser and harder. HomeGuide rates it at R-5 to R-7 per inch and lists it at $3.00 to $5.00 per square foot. At typical thickness it acts as a vapor retarder and does not absorb water, and it adds rigidity to the panel or sheathing it bonds to. We use it on the underside of raised floors where the space below is damp, on steel walls and roofs of metal buildings, at rim areas and band boards, and in spots too shallow for enough open-cell. It costs more per inch, so we do not use it where open-cell or blown-in would do the job.

Where foam pays off here

The sealed attic is the most common foam job in Bay County. Many homes have ducts and an air handler in the attic, where summer heat is fierce. Foam on the underside of the roof deck and gable walls brings that space inside the thermal envelope, so the ducts sit in air near house temperature instead of in an oven. Other jobs where foam makes sense: walls opened up during a remodel or storm repair, bonus rooms over garages, cathedral ceilings with no attic, the floors of raised beach houses, and metal shops and barns. Each one has a slightly different spec, and we write it up area by area.

What the job looks like

Foam is sprayed in layers, or lifts, to the thickness on the quote, because spraying too thick in one pass can make the foam overheat or cure badly. The house has to be cleared of people and pets during spraying, and HomeGuide advises staying out for at least 24 hours while the foam cures. In attics and crawl spaces the foam often needs an ignition barrier coating, and in living areas a thermal barrier such as drywall; we tell you which applies. Before we spray a roof deck, we look for leaks and soft decking, because foam over a wet deck traps the problem.

Is spray foam a red flag?

Some buyers and inspectors are wary of foam on roof decks because it hides the underside of the roof, and a bad install can leave odor or gaps. The answer is a careful install and records. We spray only over a sound, dry roof, keep to the manufacturer's lift thickness, and give you a written record of the foam type, thickness and areas covered. That paperwork helps when you sell.

Not sure foam is right for your house? Ask us to price it next to blown-in. Get a free estimate